Coastal Hancock, Washington, Waldo and Knox Counties 01050002
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Natural Resources RRRapid Coastal Hancock, Washington, Conservation W Service WWatershed Waldo & Knox Counties, Maine. AAAssessment Level 4 Sub-basin 01050002 I. Introduction The Coastal Hancock/Washington Counties 8- Digit Hydrologic Unit Code (HUC) sub-basin is comprised of 3,391,621 acres. Most of the sub- basin is located in Washington and Hancock Counties with minor portions extending into Waldo and Knox counties. The Coastal Hancock/Washington Counties sub-basin is predominantly forest/scrub shrub land (57.4%) and water/wetlands/tidal lands (37.1%). Other minor land uses include urban/roads (2.3 %), blueberries (1.7%), Grasslands (including pasture) (1.1%) and cultivated cropland (0.4%). Forests are primarily spruce, fir, pine and mixed hardwoods such as oak, maple, birch and poplar. Many culverts and bridges along access roads present barriers for Atlantic Salmon, a federally listed threatened specie. Sediments from roads and stream crossings also affect aquatic habitats. The Maine Department of Marine Resources (DMR) has identified 160,000 acres of shellfish habitat in this sub-basin. These habitats are susceptible to non-point pollution from the land base, which has an adverse effect on the ability to harvest shellfish for consumption. A survey of shellfish management committees in 2007 showed that the lack of available resource (number of open flats and numbers of clams) and permanently closed areas ranked at the top of the list of concerns. Conclusive data about the actual amount of restricted habitat is not readily available. Informal calculations by industry folks and DMR biologists indicate that about 50% of available habitat is permanently closed. In this watershed that would be about 25,000 acres in the intertidal zones. All of the closures are due to bacterial pollution from human or animal waste. This amount of unavailable habitat increases harvest pressures on the remaining habitats. The DMR and local shellfish committees are working hard to manage the resource but do not have the financial capacity to deal with the larger problem of the restricted areas. 3,659,827 pounds of shellfish were harvested in 2005 from Hancock and Washington Counties. 66975.6 acres of the shellfish beds have been closed due to bacterial contamination from runoff. 73,924 acres have been identified as urban/roads. 4,295 road stream crossings have been identified. Sediments from road crossing and urban development are listed as a major concern. Low quality hayfields are being converted to urban lots for development. Hay and pasture fields that are invaded with weeds such as smooth bedstraw are no longer productive and are sold for housing development, rather than reseeded for forage production. There are 636 farms in the sub-basin. Blueberries (52,296 acres) are the primary agricultural crop grown on 465 farms. Five large processors grow 60% of the blueberries on 40% of the acres. The larger farms vary from 1,000 to 10,000 acres. 460 farms grow 40% of the blueberries on 60% of the acres. These farms vary from 2 – 600 acres. Most of the blueberries from small and large farms are frozen and processed through one of the local large processors. Blueberry fields are often burned to reduce grassy weed competition. Fields are often cleared to facilitate control using mechanical and chemical methods. 100 livestock growers are listed in the New England Agricultural Census data. 80 beef producers, 19 dairy producers with 66 sheep producers are listed for this region. Of these approximately 50 are required or would benefit from a comprehensive nutrient management plan for the manure generated, stored and spread on crop and pasture fields. 171 farms grow mixed vegetables (broccoli, cucumbers, peas, pumpkins, sweet corn, squash, and tomatoes) on small acreages varying from 1 – 5 acres. These small truck farms provide locally grown produce for markets in the area. Conservation assistance is provided by four NRCS service centers (Machias, Ellsworth, Belfast and Warren), one Soil Survey office, one Resource Conservation and Development (RC&D) office. 2 II. Physical Description 6 A. Level 5 Watershed Summary The area of concern consists of one Level 4 Sub-basin, 22 Level 5 Watersheds, and 125 Level 6 Sub- watersheds. As this document is being prepared, Maine’s Watershed Boundary Dataset has been submitted for certification for inclusion into the national map. All HU Codes and Names refer to this version of the WBD (May 8, 2008). A large scale, detailed orientation map, Orientation_map_01050002.pdf, accompanies this document. See the following table for the Watershed inventory. 3 Sub-basin 01050002 - List of Level 5 Watersheds DOWNSTREAM HUC_10 WATERSHED NAME ACRES HUC_10 HU_10_MOD HU_10_TYPE 0105000201 Dennys River 83,415 0105000203 NM Standard 0105000202 Pennamaquan River 34,512 0105000203 NM Frontal 0105000203 Grand Manan Channel 196,732 OCEAN NM Frontal East Machias River-Round 0105000204 Lake 94,293 0105000205 NM Standard 0105000205 East Machias River 105,013 0105000205 NM Standard 0105000206 Upper Machias River 71,227 0105000207 NM Standard 0105000207 Middle Machias River 66,344 0105000209 NM Standard 0105000208 Old Stream 69,492 0105000209 NM Standard 0105000209 Lower Machias River 112,879 0105000210 NM Standard 0105000210 Machias Bay 109,647 OCEAN NM Frontal Roque Bluffs Frontal 0105000211 Drainages 211,406 OCEAN NM Frontal 0105000212 Pleasant River-Pleasant Bay 133,763 0105000213 NM Frontal Narraguagus River- 0105000213 Narraguagus Bay 246,741 OCEAN NM Frontal Schoodic Point-Petit-Manan 0105000214 Point Frontal Drainages 138,918 OCEAN NM Frontal 0105000215 Graham Lake 309,522 0105000216 DM,TF Standard 0105000216 Union River Bay 80,911 0105000218 NM Standard 0105000217 Frenchman Bay 416,638 OCEAN NM Frontal Blue Hill-Mount Desert 0105000218 Frontal Drainages 260,632 OCEAN NM Frontal 0105000219 Bagaduce River 52,238 OCEAN NM Frontal 0105000220 Stonington Frontal Drainages 193,010 OCEAN NM Frontal 0105000221 Belfast Bay 58,702 OCEAN NM Frontal 0105000222 Penobscot Bay 693,709 OCEAN NM Frontal Sub-basin Total 3,739,744 HU_10_MOD: modification; NM = No Modification, DM = Dam, TF = Transportation Facility HU_10_TYPE: type; Standard = single pour point, Frontal = watershed adjoins shoreline and has multiple outlets 4 B. Common Resource Area Descriptions 7 CRA – 143.ME1 – Northeastern Mountains – This area is 90% spruce, fir and northern hardwood forest. The mountains and foothills are commonly rounded; are underlain by granite, phyllite, gneiss, schist and slate; and are thinly mantled by glacial till. The principal products are lumber and pulp for the paper industry. Soils are dominantly moderately well drained and somewhat poorly drained, and formed in glacial till. CRA - 144B.ME1 – New England Upland, Northern Part – Till-mantled rolling to hilly uplands characterize most of this area, with level to gently sloping valleys terminating in coastal lowlands. This area comprises a mix of cropland and pastureland used in the production of forage for dairy and beef, truck crops, small fruits and Christmas tree farms. Soils are dominantly moderately well drained and well drained and formed in glacial till on the uplands and marine sediments and outwash materials on the coastal plain. 8 C. Precipitation Annual precipitation ranges from 43 inches to 53 inches with the higher amounts along the coast. D. Landcover Categories, in Acres, by Watershed 5. Landcover distribution is presented in two forms: Gross Landcover (10 Categories), and Detailed Landcover (22 Categories). The graphic below shows that roughly half (52.1%) of the sub-basin is forested. Sub-basin 01050002 - Gross Landcover Distribution 36.4% 2.5% Water 2.6% All Other 11.5% 1.5% 1.3% Forest 0.3% 2.2% 0.7% 52.1% 0.4% Urban/ Trans Cult. Crop Pasture/ Hay Other Grass Forest Scrub/ Shrub Open Wetland Barren Water Blue- berries Sub-basin 01050002 - Gross Landcover by Watershed (Acres) Level 5 Watersheds % of Urban/ Cult. Pasture/ Other Scrub/ Open Blue- Watershed Sub- Name HUC_10 Trans Crop Hay Grass Forest Shrub Wetland Barren Water berries Total basin Dennys River 01 1,455 699 353 29 62,340 712 3,663 165 10,978 3,014 83,409 2.5 Pennamaquan River 02 1,106 198 198 82 27,278 399 1,728 321 2,436 762 34,508 1.0 Grand Manan Channel 03 4,186 315 2,016 521 111,638 827 6,056 6,821 63,578 762 196,720 5.8 East Machias River- Round Lake 04 1,457 557 410 49 77,275 1,005 4,874 771 6,222 1,657 94,277 2.8 East Machias River 05 1,356 308 518 138 83,967 1,563 5,467 230 10,479 985 105,011 3.1 Upper Machias River 06 413 34 103 26 58,132 2,233 3,928 571 5,773 0 71,213 2.1 Middle Machias River 07 580 31 240 44 56,221 5,313 1,346 405 2,085 76 66,339 2.0 Old Stream 08 949 185 241 133 60,022 1,176 1,600 155 2,886 2,138 69,487 2.0 Lower Machias River 09 1,700 693 626 267 87,523 1,954 5,227 1,508 3,043 10,335 112,878 3.3 Machias Bay 10 743 10 222 389 31,882 602 2,155 5,322 50,865 391 92,582 2.7 Roque Bluffs Frontal Drainages 11 2,338 361 793 1,040 83,059 1,407 3,589 9,787 99,673 4,619 206,667 6.1 Pleasant River-Pleasant Bay 12 2,248 725 1,005 345 82,125 1,742 9,455 8,530 14,355 12,920 133,451 3.9 Narraguagus River- Narraguagus Bay 13 1,933 420 997 452 134,236 3,791 7,343 3,628 27,238 8,605 188,643 5.6 Schoodic Point-Petit- Manan Point Frontal Drainages 14 1,852 308 271 722 65,321 2,900 3,887 6,133 57,024 495 138,913 4.1 Graham Lake 15 2,951 2,808 1,022 680 257,854 4,426 10,657 2,830 26,203 50 309,482 9.1 Union River Bay 16 4,815 812 1,160 417 57,841 1,129 1,305 1,132 11,986 303 80,899 2.4 Frenchman Bay 17 6,796 458